Sure. The initial credentials for all the enumerated professions are all just a starting line. The years to get good at any of them total a lot more time than the initial training and everything beyond the minimum counts for more.

An A-license is similar but less significant. It's evidence that you probably know enough not to hurt yourself in a limited set of skydiving situations (but isn't enough to teach you the judgement you need too) although a half hour of freefall and couple dozen parachute landings (before the recent changes it just took seven minutes of supervision under canopy plus the corresponding landings) aren't anything compared to the hours and hundreds it takes to be decent.